THE SUPERIOR AND POSTERIOR SURFACES OF THE SPHENOID BONE

(AFTER SAPPEY.) 1, 1, the le er wings; 2, 2, the groove for the optic commi ure; 3, 3, the optic foramina; 4, the pslary [fe 6 0 Mikdibe oawermem witiec;) Tiithercateries elinoïd proce ; Ë, the posterior clinoid proce ; 11, the foramen rotund am’; 12, the foramen ovale: 18, the epinous proce ; 14, the poster lor onfice of the Vidian canal; 16, the terygold fo a; 16, the external pterygoid plate; 17, the internal pterygo.d plate; 18, The hsmular proce , projecting downward (the pterygoid proce ), It articulates with the occipital, parietal, malar. frontal, and palate h’s, with the pe- _trous and squamous portions of the temporal b., with the vomer, and occasionally with the purenion maxilla. It represents the basippuencta) pre sphenoid, ali sphenoid, and pterygoid b*s of comparative anatomy. [L, 12, 153.|—Sphenotic b. [Parker]. See Post frontal b.—Splanchnie. B's which are developed within the ti ues of some of the viscera or are connected with the organs of sense. [L, 158.]—Splenial b. Fr.… opercula ire [Aga iz, Cuvier], subvomeral (in fishes), sub lacrymal [G. St.-Hilaire]. Ger., inneres Ausfiillung tiick des Unterkiefers [Meckel, Wagner]. In comparative anatomy, a b. situated upon the inner surface of the mandible, lying between the angular and the dentary b's. ([L, 12, 14, 200.J— Splint b’s. See Rudimentary metaca: —Splinter b. See FrsuLA—Spoke b. See Panis Snore b’s. See Cancellous b's and Turbinated b's.—Squamo-mastoid b. A b. formed by the confluence of the mastoid and squamosal b’s. [L, Ee ae aenonal b. Lat.,03 squamosum. Bees (in fishes), écaille du temporal [Aga iz] (1st def.). Ger., Zit zen be in [Hallmann] (1st def.), Syn.: mastoid b. [Owen] (ist def.), mastoid b. (in fishes and reptiles), temral b. (in birds and monotremes) [Cuvier] (1st def.), temporal b. (in e crocodile), parietal b. (in birds) [G. St.-Hilaire] (1st def.). 1. In comparative anatomy, a flat, scale-like b. situated on the outer side of the head, above and in front of the auditory capsule, representing the squamous portion and the zygomatic proce of the temporal b. of human anatomy. [L, 14, 142, 153.] 2. Of Owen, the quad rato jugal b. (ist def.). (L, 14.]—Squamoso-parietal b. A b. formed the confluence of the Sapa b. (1st def.) and the parietal b. [W. K. Parker, ‘Trans. of the Zool. Soc. of London,” ii, p. 78 (L).] —Squamoso-tympanie b. A b. formed by the confluence of the squamosal (Ist def.) and the tympanic b’s. [L, 153.|—Square_ b. See Quadrate b.—Stirrup b. See Srapes —Stylo-hyal b. Fr., o elet styloide (in fishes), 0s styloide (in lizards and mammals) [Cuvier], stylohyal [G. St.-Hilaire], styloide de l'os hyoide (Aga iz).